From noon tomorrow EST through 11:59am Wednesday, if you book a weekend night with a Hilton brand property for a stay anytime this year, you can receive 2,500 bonus HHonors points upon completion of each stay up to a maximum 10,000 points for four stays.

This 24-hour event highlights the loyalty program’s “Any Weekend, Anywhere Sale,” where participating properties are offering up to 33% off weekend stays, which comprise at least one night on a Friday, Saturday or Sunday. Thursdays also qualify, but require a minimum two-night stay.

To get the bonus points, there’s a little more action required than many recent HHonors promotions. Here are the steps:

Return to the event’s Facebook page and enter your confirmation number along with your HHonors information.

Once you’ve successfully completed that stay by 12/30/12, expect to see 2,500 bonus points in your account in 4-6 weeks.

View the other terms and conditions for full details, but in a nutshell, you’re maxed out to earn this bonus four times for a total of 10,000 HHonors points. Also, the biggest “catch” is that the reservations you make under this promotion are totally nonrefundable. A 7-day advance purchase is additionally required.

It’s still a nice bonus if you already have expected, but not-yet-reserved stays, and even if you don’t book during the allocated 24-hour window for the bonus, the “Any Weekend, Anywhere” sale continues through January 31, 2012 via this web link.

I have oodles of upcoming weekend stays already booked at advance purchase rates, so unfortunately can’t change those for inclusion with this promotion. Alas, I planned too far in advance. Hope you can take advantage.